Seleuciana was an ancient city and bishopric in modern Algeria. It is now a Catholic titular see. the location has not been identified, but it was a dependency of Carthage.
History Seleuciana was a city in the Roman province of Numidia. It was important enough to become a bishopric, but is only mentioned twice, in 411 and 484.
Bishop Proficius of Seleuciana is mentioned by Victor Vitensis as summoned to Huneric's conference of Carthage in 484.
Titular see In 1964, the diocese was nominally restored as titular see of the lowest (episcopal) rank.
It has had the following (non-consecutive) incumbents: Giovanni Bianchi (1964.06.22 – 1977.06.27) Gonzalo López Marañón, Discalced Carmelites (O.C.D.), Apostolic Vicar emeritus of San Miguel de Sucumbíos (Ecuador) Marek Forgáč, Auxiliary bishop of Košice (Slovakia)
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